SDR ASAA2025101561623

Service difficulty report · Power Supply · Boeing 737790

Difficulty date: October 15, 2025
Submitted: October 17, 2025
Operation: Air carrier
Aircraft: N622AS
Make and model: Boeing 737790
Aircraft serial: 30165
Aircraft time: 73,323 hours, 38,781 cycles
System (JASC): 3350 · Emergency Lighting
Part: Power Supply
Part number: D71702001
Condition: Inoperative
Location: Zone 200
Stage of operation: IN
How discovered: C
Nature of condition: L
Precautionary procedure: K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

WHILE ACCOMPLISH TC 78233001 NOTED THE FOLLOWING LIGHTS INOPERATIVE EXTERIOR L2 DOOR, OVERWING LH AND RH AND EXIT SIGN ABOVE FLIGHT DECK DOOR. GROUNDED - YES. REMOVED & REPLACED QTY 4 BATTERY PACKS (M1668, M1669, M1673, & M1675) IAW AMM 33-51-06-960-806, OPS CHECK NORMAL.